About: http://webisa.webdatacommons.org/324843798

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Johannes, I would be very surprised if the sample was a Simple Random Sample.
http://www.w3.org/ns/prov#wasQuotedFrom	stata.com